For movies however, we have equal weight between people & movies, so we do need two-way relations like ''Actor In'' at an actor's page and ''Has Actor'' at the movie page. If we don't use inverse relations, then one would need to run an ASK query at either location to get all other relations to that page, BUT they would be dependent on all the information being there. Make sense? | For movies however, we have equal weight between people & movies, so we do need two-way relations like ''Actor In'' at an actor's page and ''Has Actor'' at the movie page. If we don't use inverse relations, then one would need to run an ASK query at either location to get all other relations to that page, BUT they would be dependent on all the information being there. Make sense? |